EPROM Eraser not erasing New EPROM

[Roger Heflin]

On Fri, 14 Apr 2000, 93 Formula wrote:

> >From: Roger Heflin  <rah at horizon.hit.net>
> >
> >You are leaving the memcal cap off while you are erasing it right?
> >
> I am not sure what you mean by this. Do you mean I should pull the chip out 
> of the memcal?  I thought it was soldered in there. I just pulled the blue 
> cover, took off the sticker and lined up the window of the chip with the 
> second (bigger) hole in the blue light datarase eraser. It seems that when I 
> put it back in the pocket programmer that there are lot of 00s but there are 
> also other random seeminly numbers listed as I do the Blank Check option. 
> The program says its looking for "FF"'s but there isnt a single FF anywhere. 
> Maybe I have the program set for the wrong type of chip. It seems like this 
> thing should have been erased HOURS ago. Its starting to feel like I'm 
> rebuilding a transmission here. LOL. It only sits about 1/4" over the light 
> tube, with it perpindicular to the datarase. I even tried it in parallel 
> with it (at a slight angle since the whole memcal wont fit)
> I'm starting to get a bad feeling that I just destroyed a brand new eprom 
> beyond repair and I wont be able to reprogram it. Then, if I try the same 
> thing on my other (original eprom), I could be out being to use the car at 
> all. That would suck big time. I take it that if I just try to dump the code 
> file to the chip as is, it wont work worth diddly, or is that worth a shot, 
> and then do a file to chip compare.

That sounds like the right procedure.    The black part is plugged
into the socket correctly and tight?

If you destroy the eprom don't worry, the eprom's are about $2-$5 
each, it is the carriers and that other chip that are expensive.
Removing it and reinstalling a new one will be a pain that it should
not be that bad.


			Roger

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